2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $23,147,017 | 3,035,362 | 3,035,362 |
| 2006 | $27,925,035 | 3,526,119 | 3,526,119 |
| 2007 | $32,896,584 | 3,735,329 | 3,735,329 |
| 2008 | $37,009,932 | 3,791,649 | 3,791,649 |
| 2009 | $29,295,760 | 3,393,947 | 3,393,947 |
| 2010 | $26,012,644 | 3,083,660 | 3,083,660 |
| 2011 | $28,279,360 | 3,248,317 | 3,248,317 |
Note: Quantity represents Weight in kilograms
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